QmlProfiler: avoid using Q_FOREACH over QVarLengthArray

The squeeze() function is called by clients for QVLA's, which means
it's copying 1-2KiB of data (depending on sizeof(value_type)) just
to iterate over a small part of it.

Use a C++11 ranged for loop.

Change-Id: I2c33ae0c5a3d9d941cd9e385fc6bbb4fb0fa3c2c
Reviewed-by: hjk <hjk@qt.io>

src/plugins/qmlprofiler/qmlevent.h

@@ -251,7 +251,7 @@ private:
     squeeze(const Container &numbers)
     {
         using Small = typename QIntegerForSize<sizeof(Number) / 2>::Signed;
-        foreach (Number item, numbers) {
+        for (Number item : numbers) {
             if (!squeezable<Number, Small>(item))
                 return false;
         }